Per 3 was updated, if you have the old original installer lying around and used that, you probably want to get a new one. I remember the old version missing many symbols too.

As for using different roof fills, it is difficult to say if you are only one or not, as I don't think too many people import new fills beyond what is already available. I can't test myself either right now, since I am currently sitting in a hotel room, away on a conference with work, and discovered I didn't have CC3+ with me at all, so I have only downloaded and installed the basics today.

This should be fixed in the next update, if everything works as intended.

Only two PC's? Count yourself lucky, you don't want to know how many installs I manage (Frankly, among the regular installs, testing and beta testing installs, dev builds, atlas install, tome and manual installs, and other special-purpose installs with their own unique configurations, I've lost count myself). I've even resorted to write my own artwork manager to make sure it is easy to install the same custom artwork to all my (standard) installs.